Question

task 2: decide if the following are examples of elements, compounds or mixtures. give reasons for your answers. task 3: write a paragraph stating what you have learned this lesson. include the words: atom, element, compound, mixture (and more if you can). © classroom chemist 2018 - present

Explanation:

Task 2:

First Box:

• An element is made of one - type of atom, a compound is made of different types of atoms chemically bonded, and a mixture has different substances not chemically combined. In the first box, each particle is made of two different types of atoms chemically bonded together. So it is a compound.

This is a compound.
I know this because each particle consists of two different types of atoms chemically bonded.

Second Box:

All the particles are identical and made of only one - type of atom. So it is an element.
This is an element.
I know this because all the particles are made of the same type of atom.

Third Box:

There are different types of particles present, some are single atoms and some are molecules of different types. They are not chemically combined with each other. So it is a mixture.
This is a mixture.
I know this because there are different types of particles not chemically bonded.

Task 3:

In this lesson, I have learned that an atom is the basic unit of matter. An element is a pure substance made up of only one type of atom. A compound is a substance formed when two or more different types of atoms chemically bond together. A mixture is a combination of two or more substances that are not chemically combined. For example, in the tasks above, we saw how to identify elements, compounds, and mixtures based on the arrangement and types of atoms in the particles. We can also have homogeneous and heterogeneous mixtures, where homogeneous mixtures have a uniform composition throughout, and heterogeneous mixtures have a non - uniform composition.

Answer:

Task 2:
First box: This is a compound. I know this because each particle consists of two different types of atoms chemically bonded.
Second box: This is an element. I know this because all the particles are made of the same type of atom.
Third box: This is a mixture. I know this because there are different types of particles not chemically bonded.
Task 3: In this lesson, I have learned that an atom is the basic unit of matter. An element is a pure substance made up of only one type of atom. A compound is a substance formed when two or more different types of atoms chemically bond together. A mixture is a combination of two or more substances that are not chemically combined. For example, in the tasks above, we saw how to identify elements, compounds, and mixtures based on the arrangement and types of atoms in the particles. We can also have homogeneous and heterogeneous mixtures, where homogeneous mixtures have a uniform composition throughout, and heterogeneous mixtures have a non - uniform composition.